Safety locking air door for underground coal mine

Abstract

The embodiment of the invention provides a safety locking air door for an underground coal mine. The safety locking air door comprises a door frame, a first door leaf, a second door leaf, a pivoting positioning piece, a driving rod and a connecting rod. One side of each of the first door leaf and the second door leaf in the width direction is connected with the door frame through the pivoting positioning piece in a relative opening and closing mode, the door frame is provided with a first hinge position point, the first door leaf is provided with a second hinge position point and a third hinge position point, the first hinge position point and the second hinge position point are arranged on the same side, and the third hinge position point is arranged on the same side. The third hinge point is arranged on the other side of the first door leaf in the thickness direction, and the second door leaf is provided with a fourth hinge point; the two ends of the driving rod are hinged to the first hinge point and the second hinge point respectively, and the two ends of the connecting rod are hinged to the third hinge point and the fourth hinge point respectively. Therefore, the safety locking air door for the underground coal mine has the advantages that the door leaf is prevented from moving upwards, and the use universality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to a safety locking damper in an underground coal mine. Background Art

[0002] The underground air door of a coal mine is an important device for controlling mine ventilation. It is mainly used to regulate the air flow underground. It plays a very critical role in the ventilation system of the mine. It can coordinate the air volume in various areas, promote air circulation and gas diffusion in the mine, thereby effectively controlling the generation and distribution of harmful gases and ensuring the life safety of miners.

[0003] However, the damper occasionally moves up during use. During operation, the vertical screws of the hinge rotate to raise the door leaf, causing the door leaf to not be closed tightly, affecting the effectiveness and safety of the damper. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a safety locking damper in a coal mine. The safety locking damper has the advantages of preventing the door leaf from moving upward and improving the versatility of use.

[0005] The safety locking damper in an underground coal mine according to an embodiment of the present invention comprises a door frame, a first door leaf, a second door leaf, a pivoting positioning member, a driving rod and a connecting rod.

[0006] One side of each of the first door leaf and the second door leaf in the width direction is connected to the door frame through the pivot positioning member so as to be relatively opened and closed, the door frame has a first hinge point, the first door leaf has a second hinge point and a third hinge point, the first hinge point and the second hinge point are arranged on the same side of the thickness direction of the first door leaf, the third hinge point is arranged on the other side of the thickness direction of the first door leaf, and the second door leaf has a fourth hinge point; the two ends of the driving rod are respectively hinged to the first hinge point and the second hinge point, and the two ends of the connecting rod are respectively hinged to the third hinge point and the fourth hinge point, so as to form a connecting rod linkage structure, so as to form a connecting rod linkage structure to drive the first door leaf and the second door leaf to open and close in linkage.

[0007] The safety locking damper in the coal mine of the present invention forms a linkage linkage structure through the drive rod, connecting rod, door frame, first door leaf and second door leaf. The drive rod pushes the linkage linkage structure in the transformation process to realize the opening and closing of the first door leaf and the second door leaf. The use of the linkage linkage structure also helps to realize the first door leaf and the second door leaf in the opening, closing and the position between the two, and then helps to adjust the opening and closing area of ​​the damper in accordance with the opening and closing angle of the door leaf required for vehicles and pedestrians to pass. When the damper is opened or closed, the opening and closing of the damper is inconsistent, which affects the airtightness of the damper and causes safety hazards and ventilation hazards on site. Therefore, the versatility of the safety locking damper during use is improved.

[0008] At the same time, compared with the track-type structure, the structure using the connecting rod is not affected by the falling rocks of the track. Therefore, the safety locking damper in the coal mine helps to improve the reliability of the damper and keep the door leaf in a balanced state when opening and closing.

[0009] In addition, the door frame is hinged to the first door leaf, the second door leaf and the door frame through the pivot positioning member, and the pivot positioning member can provide a vertical limit for the door leaf while providing a pivot limit. This helps to avoid the problem of poor sealing effect caused by the door leaf moving up under the action of wind. Furthermore, it helps to effectively control the air intake of the safety locking damper, thereby ensuring the safety of underground mine operations.

[0010] Therefore, the safety locking damper in the coal mine of the present invention has the advantages of preventing the door leaf from moving upward and improving the versatility of use.

[0011] In some embodiments, the pivot positioning member includes a fixed base, a hinged base, a pin shaft, a sleeve and a limit plate, the fixed base is fixed to the side of the door frame, the hinged base is fixed to the door leaf, the pin shaft is rotatably connected to the fixed base, the sleeve is sleeved on the pin shaft to realize the hinge connection between the door leaf and the door frame, a part of the limit plate is connected to the hinged base, and an extension of the limit plate is connected to the top of the pin shaft.

[0012] In some embodiments, an oil filling hole is provided on the fixed base, a special-shaped clamping block is provided on the top of the pin shaft, the limiting plate is provided with a clamping interface adapted to the special-shaped clamping block, the extending portion of the limiting plate is fixedly connected to the hinged base, and the fixed connection between the limiting plate and the hinged base can press the pin shaft so as to lift the pin shaft upward.

[0013] In some embodiments, the door frame includes a door frame body and a first hinge seat protruding outwardly from the door frame body, the first hinge seat has the first hinge point, and one end of the driving rod is hinged to the first hinge seat;

[0014] In some embodiments, the first door leaf includes a door leaf body and a second hinge seat and a third hinge seat arranged on the door leaf body, the second hinge seat has the second hinge point, the third hinge seat has the third hinge point, and the distance between the second hinge seat and the third hinge seat in the width direction of the safety locking damper is smaller than the distance between the first hinge seat and the second hinge seat.

[0015] In some embodiments, the second articulated seat includes an articulated seat body and one of a spherical articulated shaft and the spherical seat body disposed on the articulated seat body, and the end of the driving rod has the other of the spherical articulated shaft and the spherical seat body.

[0016] In some embodiments, the spherical seat body includes a first support and a second support that are assembled together, the first support and the second support both have a receiving groove, and the receiving groove on the first support and the receiving groove on the second support are assembled together to form a spherical receiving hole.

[0017] In some embodiments, the third hinge seat is generally L-shaped, and a third hinge point is formed on the third hinge seat. One end of the third hinge seat is connected to the first door leaf, and the other end of the third hinge seat is hinged to the connecting rod. When the damper is in the open and closed states, the third hinge point on the third hinge seat is located on the other side of the first door leaf.

[0018] In some embodiments, the first door leaf and the second door leaf are arranged on the door frame to open and close in opposite directions.

[0019] In some embodiments, the door frame is a metal door frame, and the door frame includes a crossbeam and a column, and the crossbeam and the column enclose a frame, and the frame can be installed on the tunnel wall.

[0020] In some embodiments, the safety locking damper in the coal mine further includes a seal, and the seal is arranged on the outer peripheral wall of the first door leaf and the second door leaf.

[0021] In some embodiments, the safety locking damper in the coal mine further includes a counterweight, and the counterweight is connected to the first door leaf and the second door leaf through a connecting rod.

[0022] In some embodiments, the driving rod includes a cylinder, a fixed frame and a pneumatic control box, the cylinder is set on the fixed frame, the piston chamber of the cylinder is connected to the pneumatic control box to drive the piston rod of the cylinder to move, one end of the cylinder is connected to the first hinge point, and the piston rod is connected to the second hinge point.

[0023] In some embodiments, the pneumatic control box includes an electrical control box, a position sensor, a pressure sensor and a temperature sensor. The position sensor is used to monitor the state of the damper in real time, the pressure sensor is used to monitor the pressure of the damper airflow in real time, and the temperature sensor is used to monitor the damper temperature information in real time. The position sensor, the pressure sensor and the temperature sensor respond to the electrical control box signal to control the movement of the damper according to a preset logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a stereoscopic diagram of the safety locking damper in a coal mine of the present invention.

[0025] Figure 2 yes Figure 1 Enlarged view at A.

[0026] Figure 3 It is a front view of the safety locking damper in a coal mine of the present invention.

[0027] Figure 4 It is a top view of the safety locking damper in an underground coal mine of the present invention, wherein the damper is in a closed state.

[0028] Figure 5 It is a top view of the safety locking damper in a coal mine underground of the present invention, wherein the damper is in a semi-closed state.

[0029] Figure 6 It is a top view of the safety locking damper in a coal mine of the present invention, wherein the damper is in an open state.

[0030] Figure 7 It is a three-dimensional view of the pivoting positioning member of the present invention.

[0031] Figure 8 It is an exploded view of the second articulated seat and the electric drive rod of the present invention.

[0032] Reference numerals:

[0033] Door frame 1; first hinge seat 11; door frame body 12; cross beam 121; column 122;

[0034] First door leaf 2; second hinge seat 21; hinge seat body 211; spherical hinge shaft 212;

[0035] The third hinge seat 22;

[0036] Second door leaf 3; fourth hinge point 31;

[0037] Driving rod 4; spherical seat body 41;

[0038] Connecting rod 5.

[0039] Pivot positioning member 6; fixed base 61; hinged base 62; pin 63; sleeve 64; limit plate 65; special-shaped block 66;

[0040] Seal 7. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0042] Reference below Figure 1-Figure 8 The invention describes a safety locking damper in a coal mine according to an embodiment of the present invention.

[0043] The safety locking damper for underground coal mines according to the embodiment of the present invention comprises a door frame 1 , a first door leaf 2 , a second door leaf 3 , a pivoting positioning member 6 , a driving rod 4 and a connecting rod 5 .

[0044] One side of each of the first door leaf 2 and the second door leaf 3 in the width direction is connected to the door frame 1 through a pivot positioning member 6 so as to be relatively openable and closable, the door frame 1 has a first hinge point, the first door leaf 2 has a second hinge point and a third hinge point, the first hinge point and the second hinge point are arranged on the same side of the thickness direction of the first door leaf 2, the third hinge point is arranged on the other side of the thickness direction of the first door leaf 2, and the second door leaf 3 has a fourth hinge point 31; the two ends of the driving rod 4 are respectively hinged to the first hinge point and the second hinge point, and the two ends of the connecting rod 5 are respectively hinged to the third hinge point and the fourth hinge point 31, so as to form a connecting rod linkage structure, so as to form a connecting rod linkage structure to drive the first door leaf 2 and the second door leaf 3 to open and close in linkage.

[0045] The safety locking damper in the coal mine of the present invention forms a connecting rod linkage structure through the drive rod 4, connecting rod 5, door frame 1, first door leaf 2, and second door leaf 3. The drive rod 4 pushes the connecting rod linkage structure in the transition process to realize the opening and closing of the first door leaf 2 and the second door leaf 3. The use of the connecting rod linkage structure also helps to realize the first door leaf 2 and the second door leaf 3 in the opening, closing and the position between the two, and then helps to adjust the opening and closing area of ​​the damper to match the opening and closing angle of the door leaf required for vehicles and pedestrians to pass. When the damper is opened or closed, the opening and closing of the damper is inconsistent, which affects the airtightness of the damper and causes safety hazards and ventilation hazards on site. Therefore, the versatility of the safety locking damper during use is improved.

[0046] At the same time, compared with the track-type structure, the structure using the connecting rod 5 is not affected by the falling rocks of the track. Therefore, the safety locking damper in the coal mine helps to improve the reliability of the damper, so that the door leaf remains in a balanced state when opening and closing.

[0047] In addition, the door frame 1 is hinged to the first door leaf 2 and the second door leaf 3 with the door frame 1 through the pivot positioning member 6. The pivot positioning member 6 can provide a vertical limit for the door leaf (the first door leaf 2 and the second door leaf 3) while providing a pivot limit. This helps to avoid the problem of poor sealing effect caused by the door leaf moving up under the action of wind. Furthermore, it helps to effectively control the air intake of the safety locking damper, thereby ensuring the safety of underground mine operations.

[0048] Therefore, the safety locking damper in the coal mine of the present invention has the advantages of preventing the door leaf from moving upward and improving the versatility of use.

[0049] like Figure 3 and Figure 7 As shown, the pivot positioning member 6 includes a fixed base 61, a hinged base 62, a pin 63, a sleeve 64 and a limit plate 65. The fixed base 61 is fixed on the side of the door frame, the hinged base 62 is fixed on the door leaf, the pin 63 is rotatably connected to the fixed base 61, the sleeve 64 is sleeved on the pin 63 to realize the hinge connection between the door leaf and the door frame, a part of the limit plate 65 is connected to the hinged base 62, and the extension of the limit plate 65 is connected to the top of the pin 63.

[0050] The safety locking damper in the coal mine of the present invention is divided into a fixed base 61, a hinged base 62, a pin 63, a shaft sleeve 64 and a limit plate 65, and the extension of the limit plate 65 is connected to the top of the pin 63. The limit plate 65 can give the pin 63 a downward movement trend, thereby preventing the door leaf from moving upward during use, resulting in poor sealing. Therefore, the airtightness of the safety locking damper is further improved.

[0051] Optionally, the shaft sleeve 64 is a shaft assembly set arranged horizontally; the pin shaft 63 and the shaft sleeve 64 can be arranged vertically, that is, the pin shaft 63 is arranged along the vertical direction.

[0052] like Figure 3 and Figure 7 As shown, an oil filling hole is provided on the fixed base 61 for regular oiling and maintenance, a special-shaped clamping block 66 is provided on the top of the pin shaft 63, and the limiting plate 65 is provided with a clamping interface adapted to the special-shaped clamping block 66. The extension of the limiting plate 65 is fixedly connected to the hinged base 62, and the fixed connection between the limiting plate 65 and the hinged base 62 can press the pin shaft 63 so as to lift the pin shaft 63 upward.

[0053] The safety locking damper of the coal mine underground of the present invention is provided with a special-shaped block 66 on the top of the pin shaft 63, and a card interface compatible with the special-shaped block 66 is provided on the limit plate 65. The limit plate 65 is extended to form a connecting portion fixedly connected to the hinge base 62. The pin shaft 63 can be suppressed and limited through the fixed connection between the limit plate 65 and the hinge base 62 to prevent the pin shaft 63 from lifting upward, so as to ensure the stable operation of the door leaf.

[0054] like Figures 4 to 6 As shown, the door frame 1 includes a door frame body 12 and a first hinge seat 11 protruding outwardly from the door frame body 12 . The first hinge seat 11 has a first hinge point, and one end of the driving rod 4 is hinged to the first hinge seat 11 .

[0055] Furthermore, the special-shaped block 66 and the pin 63 may be threadedly connected so that the relative positions of the pin 63 and the sleeve 64 can be adjusted during use to avoid the problem of the pin 63 lifting upward after long-term use.

[0056] The safety locking damper in the coal mine of the present invention has a door frame 1 including a door frame body 12 and a first hinge seat 11 protruding outwardly arranged on the door frame body 12, and a first hinge point is formed on the protruding hinge seat, which not only facilitates normal cooperation with the driving rod 4, but also avoids interference between the driving rod 4 and the door frame body 12. Therefore, the safety locking damper in the coal mine of the present invention has high installation convenience and avoids interference during the process of opening and closing the door.

[0057] like Figures 4 to 6 As shown, the first door leaf 2 includes a door leaf body and a second hinge seat 21 and a third hinge seat 22 arranged on the door leaf body, the second hinge seat 21 has a second hinge point, the third hinge seat 22 has a third hinge point, and the distance between the second hinge seat 21 and the third hinge seat 22 in the width direction of the safety locking damper is smaller than the distance between the first hinge seat 11 and the second hinge seat 21.

[0058] The safety locking damper in a coal mine of the present invention is provided by dividing the first door leaf 2 into a door leaf body and a second hinge seat 21 and a third hinge seat 22 arranged on the door leaf body, and setting the spacing between the second hinge seat 21 and the third hinge seat 22 in the width direction of the safety locking damper in the coal mine to be smaller than the spacing between the first hinge seat 11 and the second hinge seat 21, so that the second hinge seat 21 and the third hinge seat 22 belong to the short side drive in the connecting rod structure. Thus, it helps to avoid the problem of occupying too much space in the thickness direction of the safety locking damper in the coal mine in the overall connecting rod structure, and helps to realize the miniaturized design of the safety locking damper.

[0059] like Figures 4 to 6 and Figure 7As shown, the second articulated seat 21 includes an articulated seat body 211 and one of a spherical articulated shaft 212 and a spherical seat body 41 disposed on the articulated seat body 211, and the end of the driving rod 4 has the other of the spherical articulated shaft 212 and the spherical seat body 41. In other words, the second articulated seat 21 includes a spherical articulated shaft 212 disposed on the articulated seat body 211, and the end of the driving rod 4 has the spherical seat body 41. Or, the second articulated seat 21 includes a spherical seat body 41 disposed on the articulated seat body 211, and the end of the driving rod 4 has the spherical articulated shaft 212.

[0060] The safety locking damper in the coal mine of the present invention is universally matched between the driving rod 4 and the second hinged seat 21 through the spherical hinge shaft 212 and the spherical seat body 41, thereby improving the flexibility of the matching between the driving rod 4 and the second hinged seat 21. Moreover, when the safety locking damper is opened or closed, the hinge point of the spherical structure can make the force point where the connecting rod 5 contacts the spherical hinge shaft 212 more uniform, avoiding the deformation of the hinge shaft caused by single-point force, which leads to problems with the damper linkage, thereby affecting the airtightness of the damper, and even causing the hinge shaft to break, thereby affecting the safety hazards and ventilation hazards on site. Therefore, the reliability of the use of the safety locking damper is further improved.

[0061] like Figure 1 , Figure 2 and Figure 5 As shown, the spherical seat body 41 includes a first support and a second support that are assembled together. The first support and the second support both have a receiving groove. The receiving groove on the first support and the receiving groove on the second support are assembled together to form a spherical receiving hole.

[0062] The safety locking damper of the coal mine of the present invention is formed by combining the receiving groove on the first support and the receiving groove on the second support to form a spherical receiving hole, and when it is matched with the spherical hinge shaft 212, the safety locking damper has the advantages of high structural reliability and high assembly convenience.

[0063] like Figures 4 to 6 and Figure 7 As shown, the third hinge seat 22 is generally L-shaped, and a third hinge point is formed on the third hinge seat 22. One end of the third hinge seat 22 is connected to the first door leaf 2, and the other end of the third hinge seat 22 is hinged to the connecting rod 5. When the damper is in the open and closed states, the third hinge points on the third hinge seat 22 are all located on the other side of the first door leaf 2.

[0064] The safety locking damper for coal mines of the present invention is configured to be substantially L-shaped by setting the third hinge seat 22 to be substantially L-shaped, which helps to reduce the volume of the third hinge seat 22. The safety locking damper for coal mines of the present invention is configured to be located at the other side of the first door leaf 2 when the damper is in the open and closed states by setting the third hinge point on the third hinge seat 22, thereby avoiding the problem of interference between the connecting rod 5 and the door frame 1 when the damper is in the open and closed states during the state transition process.

[0065] Specifically, the third hinge point is arranged in a region of the third hinge seat 22 close to the other end.

[0066] like Figures 4 to 6 and Figure 7 As shown, the first door leaf 2 and the second door leaf 3 are arranged on the door frame 1 to open and close in opposite directions.

[0067] The safety locking damper for underground coal mines of the present invention helps to simplify the setting of the connecting rod linkage structure through the first door leaf 2 and the second door leaf 3. Specifically, the connecting rod linkage structure includes a connecting rod 5 which can be a single rod structure, and the corresponding damper can be opened and closed without the need for additional auxiliary hinged rods.

[0068] like Figures 3 to 6 As shown, the door frame 1 is a metal door frame, and the door frame 1 includes a crossbeam 121 and a column 122, and the crossbeam 121 and the column 122 enclose a frame, and the frame can be installed on the tunnel wall. Therefore, the safety locking damper has the advantage of good structural stability.

[0069] Optionally, the door frame 1 is made of high-strength steel to ensure the firmness and durability of the door frame.

[0070] Furthermore, the crossbeam 121 and the column 122 are connected by welding or bolts to form a stable frame, which not only supports the door leaf, but also fixes the position of the damper, ensuring that the damper can be firmly installed on the tunnel wall.

[0071] Furthermore, the first door leaf 2 and the second door leaf 3 also often use steel as the main frame, and the surface is covered with wear-resistant and corrosion-resistant materials, such as steel plates or special alloys. The first door leaf 2 and the second door leaf 3 can be composed of multiple panels, and the panels are connected to the door frame through hinges to achieve opening and closing actions. The door leaf is the main part of blocking the wind flow. It can effectively isolate the wind flow when closed to prevent the spread of harmful gases. The opening and closing actions of the door leaf need to be flexible and reliable to ensure that miners can pass smoothly.

[0072] The safety locking damper in the coal mine of the present invention further comprises a sealing member 7, which is arranged on the outer peripheral wall of the first door leaf 2 and the second door leaf 3. Thus, the safety locking damper has the advantages of further improving the sealing property and the wear resistance.

[0073] Optionally, the sealing member 7 may be a rubber product and a silicone strip, so as to ensure the excellent sealing and wear resistance of the safety locking damper.

[0074] like Figures 3 to 6 As shown, the safety locking damper for underground coal mines of the present invention further includes a counterweight, which is connected to the first door leaf 2 and the second door leaf 3 via a connecting rod 5 .

[0075] The safety locking damper in the coal mine of the present invention can further prevent the first door leaf 2 and the second door leaf 3 from moving upward by means of the counterweight, thereby helping to improve the airtightness of the safety locking damper.

[0076] like Figures 3 to 6 As shown, the drive rod 4 includes a cylinder, a fixed frame and a pneumatic control box. The cylinder is arranged on the fixed frame. The piston chamber of the cylinder is connected to the pneumatic control box to drive the piston rod of the cylinder to move. One end of the cylinder is connected to the first hinge point, and the piston rod is connected to the second hinge point.

[0077] The safety locking damper for underground coal mines of the present invention is driven by the cylinder by dividing the driving rod 4 into a cylinder, a fixing frame and a pneumatic control box. The safety locking damper has the advantage of good versatility.

[0078] The pneumatic control box includes an electrical control box, a position sensor, a pressure sensor and a temperature sensor. The position sensor is used to monitor the state of the damper in real time, the pressure sensor is used to monitor the pressure of the damper airflow in real time, and the temperature sensor is used to monitor the damper temperature information in real time. The position sensor, pressure sensor and temperature sensor respond to the signal from the electrical control box to control the movement of the damper according to preset logic.

[0079] Optionally, the pneumatic control box includes an electric control box, a position sensor, a pressure sensor and a temperature sensor. When the torque suddenly increases, it is determined that a vehicle or person is trapped, and the connecting rod linkage structure will immediately run in the opposite direction, which plays a role in protecting the damper itself and passing vehicles and pedestrians. Therefore, the safety locking damper in the coal mine has the advantage of high safety in use.

[0080] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0084] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A safety locking damper for underground coal mines, characterized in that: include: A door frame, a first door leaf, a second door leaf and a pivoting positioning member, one side of each of the first door leaf and the second door leaf in the width direction is connected to the door frame through the pivoting positioning member so as to be relatively openable and closable, the door frame has a first hinge point, the first door leaf has a second hinge point and a third hinge point, the first hinge point and the second hinge point are arranged on the same side of the thickness direction of the first door leaf, the third hinge point is arranged on the other side of the thickness direction of the first door leaf, and the second door leaf has a fourth hinge point; A driving rod and a connecting rod, wherein both ends of the driving rod are respectively hinged to the first hinge point and the second hinge point, and both ends of the connecting rod are respectively hinged to the third hinge point and the fourth hinge point, so as to form a connecting rod linkage structure to drive the first door leaf and the second door leaf to open and close in linkage.

2. The safety locking damper for underground coal mine according to claim 1, characterized in that: The pivot positioning member includes a fixed base, a hinged base, a pin shaft, a sleeve and a limit plate, the fixed base is fixed to the side of the door frame, the hinged base is fixed to the door leaf, the pin shaft is rotatably connected to the fixed base, the sleeve is sleeved on the pin shaft to realize the hinge connection between the door leaf and the door frame, a part of the limit plate is connected to the hinged base, and the extension part of the limit plate is connected to the top of the pin shaft.

3. The safety locking damper for underground coal mine according to claim 2, characterized in that: An oil filling hole is provided on the fixed base, a special-shaped clamping block is provided on the top of the pin shaft, and the limiting plate is provided with a clamping interface adapted to the special-shaped clamping block. The extending portion of the limiting plate is fixedly connected to the hinged base, and the fixed connection between the limiting plate and the hinged base can press the pin shaft so as to lift it upward.

4. The safety locking damper for underground coal mine according to claim 1, characterized in that: The door frame comprises a door frame body and a first hinge seat which is arranged on the door frame body and protrudes outwards, the first hinge seat has the first hinge position, and one end of the driving rod is hinged to the first hinge seat; And / or, the first door leaf includes a door leaf body and a second hinge seat and a third hinge seat arranged on the door leaf body, the second hinge seat has the second hinge point, the third hinge seat has the third hinge point, and the distance between the second hinge seat and the third hinge seat in the width direction of the safety locking damper is smaller than the distance between the first hinge seat and the second hinge seat.

5. The safety locking damper for underground coal mines according to claim 4, characterized in that: The second articulated seat comprises an articulated seat body and one of the spherical articulated shaft and the spherical seat body which are arranged on the articulated seat body, and the end of the driving rod has the other of the spherical articulated shaft and the spherical seat body.

6. The safety locking damper for underground coal mines according to claim 5, characterized in that: The spherical seat body includes a first support and a second support which are assembled together. The first support and the second support both have a receiving groove. The receiving groove on the first support and the receiving groove on the second support are assembled together to form a spherical receiving hole.

7. The safety locking damper for underground coal mine according to claim 1, characterized in that: The third hinge seat is generally L-shaped, and the third hinge point is formed on the third hinge seat. One end of the third hinge seat is connected to the first door leaf, and the other end of the third hinge seat is hinged to the connecting rod. When the damper is in the open and closed states, the third hinge points on the third hinge seat are all located on the other side of the first door leaf.

8. The safety locking damper for underground coal mine according to claim 1, characterized in that: The first door leaf and the second door leaf are arranged on the door frame to open and close in opposite directions; And / or, the door frame is a metal door frame, the door frame comprises a crossbeam and a column, the crossbeam and the column enclose a frame, and the frame can be installed on the tunnel wall; And / or, further comprising a sealing member, wherein the sealing member is arranged on the outer peripheral wall of the first door leaf and the second door leaf; And / or, it also includes a counterweight, which is connected to the first door leaf and the second door leaf through a connecting rod.

9. The safety locking damper for underground coal mine according to claim 1, characterized in that: The driving rod includes a cylinder, a fixed frame and a pneumatic control box. The cylinder is arranged on the fixed frame. The piston chamber of the cylinder is connected to the pneumatic control box to drive the piston rod of the cylinder to move. One end of the cylinder is connected to the first hinge point, and the piston rod is connected to the second hinge point.

10. The safety locking damper for underground coal mines according to claim 9, characterized in that: The pneumatic control box includes an electrical control box, a position sensor, a pressure sensor and a temperature sensor. The position sensor is used to monitor the state of the damper in real time, the pressure sensor is used to monitor the pressure of the damper airflow in real time, and the temperature sensor is used to monitor the damper temperature information in real time. The position sensor, the pressure sensor and the temperature sensor respond to the electrical control box signal to control the movement of the damper according to a preset logic.

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